US5036887A - Pressure-producing device - Google Patents
Pressure-producing device Download PDFInfo
- Publication number
- US5036887A US5036887A US07/332,631 US33263189A US5036887A US 5036887 A US5036887 A US 5036887A US 33263189 A US33263189 A US 33263189A US 5036887 A US5036887 A US 5036887A
- Authority
- US
- United States
- Prior art keywords
- piston
- housing
- accumulator
- opening
- bore
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B1/00—Installations or systems with accumulators; Supply reservoir or sump assemblies
- F15B1/02—Installations or systems with accumulators
- F15B1/04—Accumulators
- F15B1/08—Accumulators using a gas cushion; Gas charging devices; Indicators or floats therefor
- F15B1/24—Accumulators using a gas cushion; Gas charging devices; Indicators or floats therefor with rigid separating means, e.g. pistons
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B2201/00—Accumulators
- F15B2201/20—Accumulator cushioning means
- F15B2201/205—Accumulator cushioning means using gas
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B2201/00—Accumulators
- F15B2201/30—Accumulator separating means
- F15B2201/31—Accumulator separating means having rigid separating means, e.g. pistons
- F15B2201/312—Sealings therefor, e.g. piston rings
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B2201/00—Accumulators
- F15B2201/40—Constructional details of accumulators not otherwise provided for
- F15B2201/41—Liquid ports
Definitions
- the invention relates generally to a pressure-producing device, in particular to an accumulator or gas spring type of device for pressurizing fluid.
- Many pressure-producing devices have been proposed previously in order to ensure that a predetermined pressure is provided by means of the pressure-producing device.
- Devices such as accumulators and gas springs typically include a large number of parts in order to couple together a housing and piston device, and which necessarily include a number of sealing mechanisms to ensure that a pressurized medium, such as nitrogen, does not escape from the device.
- the sealing mechanisms must ensure that the pressurized medium does not seep from the pressure-producing device and mix with the pressurized fluid, which can have deleterious effects thereupon.
- a pressure-producing device which requires a minimum number of parts and which is easily assembled and disassembled so that the cost of manufacturing and assembly is reduced substantially.
- a pressure-producing device should be designed so that the pressurized medium does not mix with pressurized fluid, be easily assembled and disassembled within an associated body which receives the device, and provide an extended functional life with reduced degradation over the extended life.
- the present invention solves the above problems by providing a pressure-producing device of the accumulator or gas spring type which substantially reduces the cost of the unit, provides a unit easier to assemble and disassemble from the body which receives the device, provides operational characteristics which are at least equal to or improved over previous designs, and which by its very simplicity optimizes functional and structural characteristics.
- the present invention comprises a pressure-producing device received within a body having therein a bore with an opening at an end of the bore, a retention member located at the opening and stationarily disposed relative to the body, the pressure-producing device comprising a pressure-effecting housing disposed slidably within said bore, the housing having a closed end with seal means disposed thereat, the closed end and bore defining a chamber communicating with a passage, an interior opening of the housing extending to an end opening associated with the opening of the bore, piston means located within the interior opening and extending outwardly from said end opening and into engagement with said retention member, and a pressurized medium contained within said interior opening to displace said housing and piston means away from one another, the piston means defining an integral exterior profile which prevents the transmission of pressurized medium through the exterior profile, so that fluid in said chamber is pressurized by said housing for transmission via said passage.
- FIG. 1 illustrates the pressure-producing device of the present invention received within a substantially blind bore of a body.
- Device 10 may comprise an accumulator or gas spring type of device, both devices operating to effect a pressurization of fluid received within a chamber located at an end of a substantially blind bore 12.
- the device 10 is received within substantially blind bore 12 of housing or body 14.
- Blind bore 12 extends to an end opening 16 located at an end 18 of body 14.
- the end 18 of body 14 has disposed adjacent thereto a stationary retention member or retaining plate 22 which is located fixedly relative to body 14.
- Retaining plate 22 may be disposed entirely separate from and not connected with body 14, or may be connected directly to body 14 in order to ensure stationary positioning relative thereto.
- the retention member 22 is attached to the body 14 by means of cap screws 24 and predetermined length sleeves 26.
- member 22 is positioned a predetermined distance A from end 18 of body 14.
- a nonmetallic (plastic) spacer 80 is disposed between body 14 and retention member 22.
- Device 10 comprises a housing 30 which includes a closed end 32 and an end opening 34.
- the end opening 34 of housing 30 includes a rolled-over or crimped end 35 which defines the end opening.
- Closed end 32 comprises a cap 36 which is attached fixedly to end 32 by any well-known means, such as welding. Closed end 32 may also be integral with housing 30 by means of a single piece extrusion.
- Cap 36 includes a recessed open area 37 which increases the amount of pressurized medium in housing 30, and an exterior recess or groove 38 receiving therein sealing means 40.
- Sealing means 40 includes a backup ring 42 and an 0-ring 44. Closed end 32 of housing 30, and specifically the cap 36, defines with blind bore 12 a pressurizing chamber 50.
- the body 14 includes a passage 20 which transmits pressurized fluid therethrough.
- Pressurizing chamber 50 receives fluid via passage 20, and in conjunction with the operation of pressure-producing device 10, pressurized fluid is transmitted from chamber 50 and through passage 20.
- the housing includes an interior opening 39 with a pressurized medium therein, such as nitrogen.
- a piston 60 Located within interior opening 39 is a piston 60 which is generally U-shaped to define a piston bore 62. Piston 60 is located within crimped end 35 by means of a charging and crimping assembly method that is well known within the art. An illustration of this well-known method is Ludwig U.S. Pat. No.
- Piston 60 is an integral unit which provides an integral exterior profile that prevents any pressurized medium from being transmitted through the walls or surface of the piston. Piston 60 comprises an enlarged diameter section 64 extending to a reduced diameter section 66. Sections 64, 66 define therebetween a shoulder 68 which may abut the rolled-over end 35.
- Reduced diameter section 66 includes an end 67 which abuts retention member 22.
- Piston 60 includes an exterior recess or groove 69 receiving therein sealing mechanism 70.
- Sealing mechanism 70 comprises a backup ring 72 and a seal 74.
- Seal 74 slidably and sealingly engages an interior surface of interior opening 39 in order to retain the pressurized medium within opening 39 and piston bore 62.
- the U-shaped or cup-shaped piston 60, via bore 62, and recessed open area 37 of cap 36, provide an increased interior volume for the containment of a larger quantity of pressurized medium or gas so that a sufficient amount of pressurized medium can be retained over an extended operational life of device 10.
- the pressure-producing device is received within blind bore 12 wherein the displacing effect of the pressurized medium within opening 39 and piston bore 62 displaces housing 30 along bore 12 to pressurize fluid within chamber 50.
- piston 60 is biased inwardly of housing 30 so that housing 30, by reaction, moves upwardly in bore 12 to pressurize fluid received within chamber 50.
- the volume of chamber 50 expands so that the housing 30 is displaced downwardly against the reaction pressure of the pressurized medium in opening 39 and piston bore 62.
- the reaction pressure of the pressurized medium biases housing 30 against the fluid in chamber 50 to effect pressurization thereof, so that pressurized fluid is available for transmission through passage 20.
- the pressure-producing device 10 described above is particularly useful as an accumulator in an adaptive braking system for vehicles.
- the body 14 may comprise a modulator housing 14 which typically receives solenoid valves, accumulators and other components.
- the pressurized fluid received within chamber 50 is a pressurized brake fluid which is pumped under pressure into chamber 50, via passage 20, so that housing 30 is displaced along bore 12.
- this pressure is available instantaneously via the pressurized fluid contained in chamber 50 and effected by accumulator 10.
- the pressure-producing device of the present invention provides numerous and substantial advantages over prior pressure-producing devices.
- the device requires substantially fewer parts which contributes to a significant reduction in cost, an enhanced reliability of design, and an improved operational life. Because there are fewer parts, there are fewer possible failures or defects and therefore the operational life and reliability are improved.
- end cap 36 serves the dual function of sealing the pressurized medium within the interior of housing 30 and piston 60 and being a pressure-effecting piston means for the fluid received within chamber 50. Assembly time is drastically reduced because an accumulator is simply removed from a shipping container and installed directly in the modulator housing. The installation can be done by hand with no additional fixtures, tools, or presses required.
- Assembly cost is substantially reduced because during assembly there is only one part, the accumulator, that is handled.
- the accumulator centers automatically in the bore.
- Retention plate 22 is common to a number of solenoid valves received within the modulator housing. Thus, the plate can be removed to allow easy access and servicing of solenoid valves and the accumulator.
- a substantial benefit of the present invention is sealing mechanism 70 being located adjacent end opening 16 of modulator housing 14, which is at an end of bore 12 that is opposite where pressurized fluid is contained within chamber 50. The pressurized medium, if it should leak, would not seep into the brake fluid, and likewise brake fluid, if it should seep beyond sealing means 40, will not enter into the interior opening 39 of housing 30.
- accumulator 10 The majority of accumulator 10 is buried within modulator housing 14 with the remaining portion surrounded by the spacer 80 so that the accumulator is completely out of sight. Because the accumulator or device is not exposed, it cannot be damaged by being hit by other objects, and the result is a very streamlined housing assembly with no objects protruding therefrom. Because of the overall design and performance of the pressure-producing device, the performance of the device should be equal to or better than previous constructions and also have an extended performance life due to less degradation over an extended length of time.
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Supply Devices, Intensifiers, Converters, And Telemotors (AREA)
- Press Drives And Press Lines (AREA)
Abstract
Description
Claims (21)
Priority Applications (7)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US07/332,631 US5036887A (en) | 1989-03-20 | 1989-03-20 | Pressure-producing device |
CA002009994A CA2009994C (en) | 1989-03-20 | 1990-02-14 | Pressure-producing device |
PCT/US1990/001434 WO1990011451A1 (en) | 1989-03-20 | 1990-03-16 | Pressure-producing device |
EP90905957A EP0464148B1 (en) | 1989-03-20 | 1990-03-16 | Pressure-producing device |
JP2505841A JP2857249B2 (en) | 1989-03-20 | 1990-03-16 | Pressure generator |
AU54107/90A AU5410790A (en) | 1989-03-20 | 1990-03-16 | Pressure-producing device |
DE1990600773 DE69000773T2 (en) | 1989-03-20 | 1990-03-16 | PRESSURE GENERATOR. |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US07/332,631 US5036887A (en) | 1989-03-20 | 1989-03-20 | Pressure-producing device |
Publications (1)
Publication Number | Publication Date |
---|---|
US5036887A true US5036887A (en) | 1991-08-06 |
Family
ID=23299113
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US07/332,631 Expired - Lifetime US5036887A (en) | 1989-03-20 | 1989-03-20 | Pressure-producing device |
Country Status (6)
Country | Link |
---|---|
US (1) | US5036887A (en) |
EP (1) | EP0464148B1 (en) |
JP (1) | JP2857249B2 (en) |
AU (1) | AU5410790A (en) |
CA (1) | CA2009994C (en) |
WO (1) | WO1990011451A1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5628496A (en) * | 1995-06-07 | 1997-05-13 | Avm, Inc. | Pneumatic spring |
Citations (26)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
SU248954A1 (en) * | СИЛОВОЙ цилиндр | BILATERAL ACTION | ||
US503091A (en) * | 1893-08-08 | keutzsch | ||
US1625751A (en) * | 1925-06-12 | 1927-04-19 | Frederick C Langenberg | Fluid-pressure intensifier |
DE470941C (en) * | 1926-08-26 | 1929-01-31 | Maybach Motorenbau G M B H | Method for starting motor vehicles, in particular rail vehicles |
US1881255A (en) * | 1927-03-08 | 1932-10-04 | Chester H Braselton | Gasoline pump |
US2321093A (en) * | 1940-12-20 | 1943-06-08 | James A Lupfer | Pressure equalizer |
GB599791A (en) * | 1944-02-04 | 1948-03-22 | Wellman Seaver Rolling Mill Co | Improvements in or relating to hydraulic accumulators of the weight loaded type |
GB711107A (en) * | 1951-07-20 | 1954-06-23 | Electrol Inc | Improvements in piston type accumulators |
GB753626A (en) * | 1953-05-01 | 1956-07-25 | Electrol Inc | Improvements in accumulators for hydraulic systems |
GB767046A (en) * | 1953-07-04 | 1957-01-30 | Mercier Jean | Sealing arrangements including toric seals between axially movable inner and outer cylindrical members |
USRE24382E (en) * | 1957-10-29 | Piston accumulator | ||
US2993472A (en) * | 1960-06-06 | 1961-07-25 | Einsiedler Charles Stephen | Hydraulic cylinder |
US3028881A (en) * | 1960-11-17 | 1962-04-10 | Stewart And Stevenson Distribu | Pressure accumulator apparatus |
GB944514A (en) * | 1959-10-13 | 1963-12-18 | Fielding & Platt Ltd | Improvements in or relating to hydraulic accumulators |
US3303856A (en) * | 1963-09-16 | 1967-02-14 | Tayco Dev | Controlled differential compression device |
US3467140A (en) * | 1965-07-16 | 1969-09-16 | Ralph P Piffath | Hermetical sealing mechanism |
US3480336A (en) * | 1967-11-27 | 1969-11-25 | Trw Inc | Hydraulic actuated skid control device |
US3695731A (en) * | 1968-02-01 | 1972-10-03 | Michael John England | Vehicle braking system |
US3809437A (en) * | 1971-09-25 | 1974-05-07 | Aisin Seiki | Anti-skid brake control system |
US4043352A (en) * | 1976-08-05 | 1977-08-23 | Simpson Alden H | Pressure accumulator |
US4046167A (en) * | 1976-02-06 | 1977-09-06 | Kawneer Company, Inc. | Mechanical accumulator |
US4095851A (en) * | 1975-12-04 | 1978-06-20 | Aisin Seiki Kabushiki Kaisha | Modulator for anti-skid brake control system |
US4208952A (en) * | 1976-12-27 | 1980-06-24 | The Bendix Corporation | Piston with extended axial travel |
US4402554A (en) * | 1980-12-31 | 1983-09-06 | Itt Industries, Inc. | Pressure control device for a pressure accumulator |
US4702532A (en) * | 1985-03-23 | 1987-10-27 | Lucas Industries Public Limited Company | Hydraulic anti-skid braking systems for vehicles |
US4769990A (en) * | 1987-06-25 | 1988-09-13 | Allied Signal Inc. | Combination accumulator and variable volume sump |
-
1989
- 1989-03-20 US US07/332,631 patent/US5036887A/en not_active Expired - Lifetime
-
1990
- 1990-02-14 CA CA002009994A patent/CA2009994C/en not_active Expired - Fee Related
- 1990-03-16 JP JP2505841A patent/JP2857249B2/en not_active Expired - Fee Related
- 1990-03-16 WO PCT/US1990/001434 patent/WO1990011451A1/en active IP Right Grant
- 1990-03-16 AU AU54107/90A patent/AU5410790A/en not_active Abandoned
- 1990-03-16 EP EP90905957A patent/EP0464148B1/en not_active Expired - Lifetime
Patent Citations (26)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
USRE24382E (en) * | 1957-10-29 | Piston accumulator | ||
US503091A (en) * | 1893-08-08 | keutzsch | ||
SU248954A1 (en) * | СИЛОВОЙ цилиндр | BILATERAL ACTION | ||
US1625751A (en) * | 1925-06-12 | 1927-04-19 | Frederick C Langenberg | Fluid-pressure intensifier |
DE470941C (en) * | 1926-08-26 | 1929-01-31 | Maybach Motorenbau G M B H | Method for starting motor vehicles, in particular rail vehicles |
US1881255A (en) * | 1927-03-08 | 1932-10-04 | Chester H Braselton | Gasoline pump |
US2321093A (en) * | 1940-12-20 | 1943-06-08 | James A Lupfer | Pressure equalizer |
GB599791A (en) * | 1944-02-04 | 1948-03-22 | Wellman Seaver Rolling Mill Co | Improvements in or relating to hydraulic accumulators of the weight loaded type |
GB711107A (en) * | 1951-07-20 | 1954-06-23 | Electrol Inc | Improvements in piston type accumulators |
GB753626A (en) * | 1953-05-01 | 1956-07-25 | Electrol Inc | Improvements in accumulators for hydraulic systems |
GB767046A (en) * | 1953-07-04 | 1957-01-30 | Mercier Jean | Sealing arrangements including toric seals between axially movable inner and outer cylindrical members |
GB944514A (en) * | 1959-10-13 | 1963-12-18 | Fielding & Platt Ltd | Improvements in or relating to hydraulic accumulators |
US2993472A (en) * | 1960-06-06 | 1961-07-25 | Einsiedler Charles Stephen | Hydraulic cylinder |
US3028881A (en) * | 1960-11-17 | 1962-04-10 | Stewart And Stevenson Distribu | Pressure accumulator apparatus |
US3303856A (en) * | 1963-09-16 | 1967-02-14 | Tayco Dev | Controlled differential compression device |
US3467140A (en) * | 1965-07-16 | 1969-09-16 | Ralph P Piffath | Hermetical sealing mechanism |
US3480336A (en) * | 1967-11-27 | 1969-11-25 | Trw Inc | Hydraulic actuated skid control device |
US3695731A (en) * | 1968-02-01 | 1972-10-03 | Michael John England | Vehicle braking system |
US3809437A (en) * | 1971-09-25 | 1974-05-07 | Aisin Seiki | Anti-skid brake control system |
US4095851A (en) * | 1975-12-04 | 1978-06-20 | Aisin Seiki Kabushiki Kaisha | Modulator for anti-skid brake control system |
US4046167A (en) * | 1976-02-06 | 1977-09-06 | Kawneer Company, Inc. | Mechanical accumulator |
US4043352A (en) * | 1976-08-05 | 1977-08-23 | Simpson Alden H | Pressure accumulator |
US4208952A (en) * | 1976-12-27 | 1980-06-24 | The Bendix Corporation | Piston with extended axial travel |
US4402554A (en) * | 1980-12-31 | 1983-09-06 | Itt Industries, Inc. | Pressure control device for a pressure accumulator |
US4702532A (en) * | 1985-03-23 | 1987-10-27 | Lucas Industries Public Limited Company | Hydraulic anti-skid braking systems for vehicles |
US4769990A (en) * | 1987-06-25 | 1988-09-13 | Allied Signal Inc. | Combination accumulator and variable volume sump |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5628496A (en) * | 1995-06-07 | 1997-05-13 | Avm, Inc. | Pneumatic spring |
Also Published As
Publication number | Publication date |
---|---|
CA2009994C (en) | 2000-08-29 |
EP0464148B1 (en) | 1993-01-13 |
WO1990011451A1 (en) | 1990-10-04 |
JP2857249B2 (en) | 1999-02-17 |
EP0464148A1 (en) | 1992-01-08 |
AU5410790A (en) | 1990-10-22 |
CA2009994A1 (en) | 1990-09-20 |
JPH04504159A (en) | 1992-07-23 |
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AS | Assignment |
Owner name: MAREMONT CORPORATION, A CORP. OF IL, ILLINOIS Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:WOOD, TOMMY;REEL/FRAME:005074/0708 Effective date: 19890313 Owner name: ALLIED-SIGNAL INC., A CORP. OF DE, NEW JERSEY Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:JOY, THEODORE J.;REEL/FRAME:005074/0706 Effective date: 19880320 |
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